+ 7h 50m = three 2~hop echoes are seen between 6 and 7mc
+ 8h 20m ~ clear 2- and 3-hop obliques continue
+ 8h 52m = obliques may still be seen, although effect is
probably near end; sporadic E blankets the F2
layer shortly after this time
3 hed,
At Adal:
In order that no possible data sources be. overlooked, Jonospher-
ic recards taken at Adak during Operation CASTIE were examined for
possible shot effects. It was found, however, that ionospheric
irregulevities of the type interpreted elsewhere as shot effects occur
very often at Adak under normal conditions. Thus, it is impossible to
definitely identify any shot effect which might have been present.
However, there were definite oblique echoes present after Shot 1, 2, 4,
and 5, at times which indicate that they could have resulted froma ~
disturbance propagated at a velocity of the order found at other
locations. If these effects were shot-caused, the indicated velocities
were: Shot 1 - 12.1 or 9.0 kn/min, Shot 2 - 11.6 or 925 Shot 4 10.3, and Shot 5 = 9.7
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Le,
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